US Bridges

Nfa 979 (sa 1109) over Half Pond Creek

Fair

Cheatham County, Tennessee · 3.5 M. Ne. SR12. · Structure no. 11F00050013

Built
1969
56 years old
Condition
Fair
inspected July 2024
Type
Culvert
Concrete Continuous
Length
45 ft
2 main spans
Daily traffic
575
2021 count
Owner
County
County Highway Agency

About this bridge

Nfa 979 (sa 1109) over Half Pond Creek is a concrete continuous culvert carrying Nfa 979 (sa 1109) over Half Pond Creek in Cheatham County, Tennessee. It was built in 1969, so it is 56 years old, older than the Tennessee average of 47.4 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 5 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 575 vehicles a day, roughly 3% of them trucks, projected to reach 656 by 2040. The structure is 45 ft (13.7 m) long and 24 ft wide. If it were closed, the detour would be 3.7 mi (6 km).

Location

Open in Google Maps
CarriesNfa 979 (sa 1109)
CrossesHalf Pond Creek
Location3.5 M. Ne. SR12.
RouteCounty Highway 979
CountyCheatham County
StateTennessee
Coordinates36.42005, -87.128
Functional classRural Minor Collector

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Channel and channel protection7 GoodSome minor problems.
Culvert5 FairAll primary structural elements are sound but may have minor section loss, cracking, spalling or scour.
Last inspectionJuly 2024
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourFoundations stable; scour above top of footing
Structural evaluation5: Somewhat better than minimum adequacy to tolerate being left in place as is
Deck geometry3: Basically intolerable, requiring high priority of corrective action
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating67.5 US tons
Inventory rating35.7 US tons

Structure

Structure typeCulvert
MaterialConcrete Continuous
DeckConcrete, cast-in-place
Main spans2
Design loadH 15
Structure length45 ft (13.7 m)
Longest span15 ft (4.6 m)
Deck width24 ft (7.3 m)
Roadway width20 ft (6.2 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic575 (2021)
Projected traffic656 by 2040
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed3.7 mi (6 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusHistorical significance not determinable at this time
Work proposedWidening of existing bridge without deck rehabilitation
Estimated improvement cost$154,000 (2020 estimate)
NavigationNo navigation control on waterway

Frequently asked questions

When was Nfa 979 (sa 1109) over Half Pond Creek built?

It was built in 1969, making it 56 years old in 2025.

What condition is Nfa 979 (sa 1109) over Half Pond Creek in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in July 2024.

How much traffic does Nfa 979 (sa 1109) over Half Pond Creek carry?

About 575 vehicles per day (2021 count), of which roughly 3% are trucks.

How long is Nfa 979 (sa 1109) over Half Pond Creek?

The structure is 45 ft (13.7 m) long with a longest span of 15 ft (4.6 m) and a deck 24 ft wide.

Who owns Nfa 979 (sa 1109) over Half Pond Creek?

It is owned by the County Highway Agency.